Participatory breeding of tomato under organic managementThe production and consumption of agricultural products derived from organic agriculture have expanded over the years. This agriculture model needs adapted genotypes to expand the production and meet the population expectation. The participatory breeding play a fundamental role in the development of cultivars that meet the needs of this organic model. The present study aimed to evaluate the performance of 12 inbred lines of tomato under two organic systems. The experiments were carried out at the Farm School of the Universidade Estadual de Londrina (UEL) (experiment I) and at a farm in the Guaravera district (experiment II), Londrina, Paraná State, Brazil. The following lines were evaluated: IPA-6 Super, Lignon, Viradoro, SPH92-434, Rimone, Massag-72, RG Angarten, Missouri91, TXL-1004, H1548, Rio Fuego and CTN. The experimental design used was randomized block with three replications. Six agronomic characters (number and average weight of marketable fruits, total production of marketable fruits, fruit wall thickness, length and fruit diameter) and four organoleptic characteristics (pH, soluble solids, acidity and ratio between soluble solids content and acidity) were evaluated. A wide variability among genotypes and environments studied was observed, and the experiment I was superior to II for characteristics related to yield. According to the results obtained, the H1548 inbred line can be recommended for organic production in the northern Paraná State.
O presente trabalho teve como objetivo caracterizar e analisar comparativamente o custo entre o manejo fitossanitário orgânico e o convencional da cultura do tomateiro em estufa no norte do Paraná, bem como seus impactos na rentabilidade da atividade. Foram analisados cinco cultivos orgânicos de tomate e um convencional em áreas de quatro municípios distintos, avaliando-se: Renda Bruta Total (RT); Custo Operacional Total (COT); Produtividade (quilograma por planta e Caixas/1000m²); Relação Benefício Custo (B/C); Custo de Controle Fitossanitário Total (CFT); Custo do Controle de Pragas (CCP); Custo do Controle de Doenças (CCD); Impacto do Custo do Controle Fitossanitário na Rentabilidade da Atividade (ICRA) e Impacto do Custo de Controle Fitossanitário no Custo Total da Atividade (ICTA). Verificou-se que dois cultivos orgânicos tiveram o menor custo de manejo de pragas e de manejo fitossanitário total por caixa produzida entre todas as áreas analisadas. Na área orgânica P1 os impactos do custo do manejo fitossanitário total na rentabilidade do cultivo e no custo total da atividade foram os menores entre todas as áreas estudadas. No entanto, a área convencional teve a maior rentabilidade entre os cultivos.
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